1 /* 2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) 3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice including the dates of first publication and 13 * either this permission notice or a reference to 14 * http://oss.sgi.com/projects/FreeB/ 15 * shall be included in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. 24 * 25 * Except as contained in this notice, the name of Silicon Graphics, Inc. 26 * shall not be used in advertising or otherwise to promote the sale, use or 27 * other dealings in this Software without prior written authorization from 28 * Silicon Graphics, Inc. 29 */ 30 31 /* 32 * glcurveval.h 33 * 34 */ 35 36 #ifndef __gluglcurveval_h_ 37 #define __gluglcurveval_h_ 38 39 #include "gluos.h" 40 #include <GL/gl.h> 41 #include <GL/glu.h> 42 #include "basiccrveval.h" 43 44 class CurveMap; 45 46 /*for internal evaluator callback stuff*/ 47 #ifndef IN_MAX_BEZIER_ORDER 48 #define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/ 49 #endif 50 51 #ifndef IN_MAX_DIMENSION 52 #define IN_MAX_DIMENSION 4 53 #endif 54 55 typedef struct curveEvalMachine{ 56 REAL uprime; //cached previously evaluated uprime 57 int k; //the dimension 58 REAL u1; 59 REAL u2; 60 int ustride; 61 int uorder; 62 REAL ctlpoints[IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION]; 63 REAL ucoeff[IN_MAX_BEZIER_ORDER];//cache the polynomial values 64 } curveEvalMachine; 65 66 class OpenGLCurveEvaluator : public BasicCurveEvaluator { 67 public: 68 OpenGLCurveEvaluator(void); 69 virtual ~OpenGLCurveEvaluator(void); 70 void range1f(long, REAL *, REAL *); 71 void domain1f(REAL, REAL); 72 void addMap(CurveMap *); 73 74 void enable(long); 75 void disable(long); 76 void bgnmap1f(long); 77 void map1f(long, REAL, REAL, long, long, REAL *); 78 void mapgrid1f(long, REAL, REAL); 79 void mapmesh1f(long, long, long); 80 void evalpoint1i(long); 81 void evalcoord1f(long, REAL); 82 void endmap1f(void); 83 84 void bgnline(void); 85 void endline(void); 86 put_vertices_call_back(int flag)87 void put_vertices_call_back(int flag) 88 { 89 output_triangles = flag; 90 } 91 #ifdef _WIN32 92 void putCallBack(GLenum which, void (GLAPIENTRY *fn)() ); 93 #else 94 void putCallBack(GLenum which, _GLUfuncptr fn ); 95 #endif set_callback_userData(void * data)96 void set_callback_userData(void *data) 97 { 98 userData = data; 99 } 100 101 /*------------------begin for curveEvalMachine------------*/ 102 curveEvalMachine em_vertex; 103 curveEvalMachine em_normal; 104 curveEvalMachine em_color; 105 curveEvalMachine em_texcoord; 106 int vertex_flag; //whether there is a vertex map or not 107 int normal_flag; //whether there is a normal map or not 108 int color_flag; //whether there is a color map or not 109 int texcoord_flag; //whether there is a texture map or not 110 111 REAL global_grid_u0; 112 REAL global_grid_u1; 113 int global_grid_nu; 114 115 void inMap1f(int which, //0: vert, 1: norm, 2: color, 3: tex 116 int dimension, 117 REAL ulower, 118 REAL uupper, 119 int ustride, 120 int uorder, 121 REAL *ctlpoints); 122 123 void inPreEvaluate(int order, REAL vprime, REAL *coeff); 124 void inDoDomain1(curveEvalMachine *em, REAL u, REAL *retPoint); 125 void inDoEvalCoord1(REAL u); 126 void inMapMesh1f(int umin, int umax); 127 128 void (GLAPIENTRY *beginCallBackN) (GLenum type); 129 void (GLAPIENTRY *endCallBackN) (void); 130 void (GLAPIENTRY *vertexCallBackN) (const GLfloat *vert); 131 void (GLAPIENTRY *normalCallBackN) (const GLfloat *normal); 132 void (GLAPIENTRY *colorCallBackN) (const GLfloat *color); 133 void (GLAPIENTRY *texcoordCallBackN) (const GLfloat *texcoord); 134 135 void (GLAPIENTRY *beginCallBackData) (GLenum type, void* data); 136 void (GLAPIENTRY *endCallBackData) (void* data); 137 void (GLAPIENTRY *vertexCallBackData) (const GLfloat *vert, void* data); 138 void (GLAPIENTRY *normalCallBackData) (const GLfloat *normal, void* data); 139 void (GLAPIENTRY *colorCallBackData) (const GLfloat *color, void* data); 140 void (GLAPIENTRY *texcoordCallBackData) (const GLfloat *texcoord, void* data); 141 142 void* userData; //the opaque pointer for Data callback functions 143 void beginCallBack(GLenum type, void* data); 144 void endCallBack(void* data); 145 void vertexCallBack(const GLfloat *vert, void *data); 146 void normalCallBack(const GLfloat *normal, void* data); 147 void colorCallBack(const GLfloat *color, void* data); 148 void texcoordCallBack(const GLfloat *texcoord, void* data); 149 150 151 /*------------------end for curveEvalMachine------------*/ 152 153 private: 154 int output_triangles; //true 1; false 0 155 }; 156 157 #endif /* __gluglcurveval_h_ */ 158